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7 Cards in this Set
- Front
- Back
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membrane potential |
The charge difference between a cell's cytoplasm and the extracellular fluid, due to the differential distribution of ions. It affects the activity of excitable cells and the transmembrane movement of all charged substances. |
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resting potential |
The membrane potential characteristic of a nonconducting, excitable cell, with the inside of the cell more negative than the outside. |
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equilibrium potential |
The magnitude of a cell's membrane voltage at equilibrium; calculated using the Nernst equation. |
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gated ion channel |
A gated channel for a specific ion. When ion channels are opened or closed, the membrane potential of the cell is altered. |
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stretched-gated ion channel |
Protein pore in a cell's plasma membrane that opens when the membrane is mechanically deformed, allowing the passage of certain ions. |
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ligand-gated ion channel |
A protein pore in the plasma membrane that opens or closes in response to a chemical signal, allowing or blocking the flow of specific ions. |
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voltage-gated ion channel |
A specialized ion channel that opens or closes in response to changes in membrane potential. |
